Brucellosis is a zoonosis or a disease that can be transmitted from animals to humans. People can also get the disease by eating products from infected animals. It is also known as undulant fever or Mediterranean fever.

E. coli is the common name for the bacteria called Escherichia coli. The disease it caused is sometimes known as colibacillosis. E. coli is a normal component of intestinal flora. Pathogenic strains of the bacteria can cause severe gastrointestinal disease. Many strains can cause skin and wound infections and abscesses.

Plague is a severe disease caused by the bacteria, Yersinia pestis. It has several forms - bubonic plague, pneumonic plague, and septicemic plague. It can be successfully treated with antibiotics if the disease is recognized in time.
This is the disease that caused the "black death" throughout history. It is transmitted by fleas from infected rats and other rodents. It can also spread person to person via body fluids and aerosol droplets.

Staphylococcal or Staph bacteria cause several diseases. The toxin produced by Staph in food causes a type of food poisoning. Staphylococci also cause skin, surgical site, and wound infections, some of which are resistant to most antibiotics. Staph are also one of the major causes of toxic shock syndrome.

Tularemia is a bacterial infection of wild rodents that is caused by the organism Francisella tularensis. It is transmitted to humans by contact with animal tissues or ticks.
There is current concern about its use as a biological weapon.